Materials Literature
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Abstract Preliminary studies revealed that exchangeable K levels in Iowa soils fluctuated in response to vapor pressure changes and air drying. This phenomenon was investigated in relation to (1) K nutrition of plants in the greenhouse and (2) the problem of predicting the relative K‐fertility status in a wide range o…
Abstract The mechanism of cold mastication of natural and synthetic rubbers, as proposed by Kauzmann and Eyring, and by Pike and Watson, in volves the mechanical rupture of the polymer chain yielding polymer radicals which are stabilized by interaction with radical‐acceptor molecules to give the degraded polymer. This…
The reflections from the surface of a dielectric lens may be cancelled by a quarter-wavelength layer of refractive index intermediate between that of air and the lens medium. The possibility of simulating a quarter-wave matching section by perturbing the boundary of the lens is described in this paper. Some of the con…
Abstract The effect of nine inhibitors on the 2,2′‐azobisisobutyronitrile initiated polymerization of methyl acrylate in methyl propionate solution has been studied kinetically by a dilatometric method. The rate constants obtained are compared with those found for these same compounds in methyl methacrylate polymeriza…
The temperature dependence of the susceptibility of the antiferromagnetic compound MnTe was measured over a range of temperature between liquid nitrogen temperature and 720°C. An abrupt change in slope and a maximum of the susceptibility curve were found at 37°C and at 55°C respectively. These results are compared wit…
P. C. Carman and L. H. Stein, Trans. Faraday Soc., 1956, 52, 619 DOI: 10.1039/TF9565200619
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The Kittel-Devonshire phenomenological treatment of antiferroelectricity is extended to the case of polarizations in three dimensions in a pseudo-cubic material. There are ten possible solutions of the proposed free energy equation, corresponding to non-polar, ferroelectric, antiferroelectric and ferrielectric states,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Stability of the Rare Earth Complexes with N-Hydroxyethylethylenediaminetriacetic AcidF. H. Spedding, J. E. Powell, and E. J. WheelwrightCite this: J. Am. Chem. Soc. 1956, 78, 1, 34–37Publication Date (Print):January 1, 1956Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPOLYPEPTIDES. VI. POLY-α-L-GLUTAMIC ACID: PREPARATION AND HELIX-COIL CONVERSIONS1E. R. Blout and M. IdelsonCite this: J. Am. Chem. Soc. 1956, 78, 2, 497–498Publication Date (Print):January 1, 1956Publication History Published online1 May 2002Published inissue 1 January 1956h…
Polishing and etching techniques suitable for the metallographic examination of polycrystalline barium titanate ceramics are described. Interpretation of the photomicrographs reveals information which may be correlated with the electromechanical properties.
Silicon n-p-n transistors have been made in which the base and emitter regions were produced by diffusing impurities from the vapor phase. Transistors with base layers 3.8 × 10−4-cm thick have been made. The diffusion techniques and the processes for making electrical contact to the structures are described. The elect…
A. C. Newns, Trans. Faraday Soc., 1956, 52, 1533 DOI: 10.1039/TF9565201533
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen-Containing Groups on the Surface of Carbon BlackMerton L. Studebaker, E. W. D. Huffman, A. C. Wolfe, and L. G. NaborsCite this: Ind. Eng. Chem. 1956, 48, 1, 162–166Publication Date (Print):January 1, 1956Publication History Published online1 May 2002Published inissue…
Abstract The industrial β‐carotene manufacturing procedure based on Inhoffen's synthesis C 19 + C 2 + C 19 = C 40 is described. β‐Ionone is first lengthened to β‐C 14 ‐aldehyde as in our vitamin A‐synthesis. By acetalisation, condensation with vinyl ether and treatment with acid the new β‐C 16 ‐aldehyde is obtained. R…
This investigation provides both a theoretical and an experimental analysis of the factors which affect the mode of solidification of a binary alloy. These factors are: (i) the concentration of solute in the melt (C 0 ); (ii) the rate of solidification (R); (iii) the temperature gradient in the melt at the solid–liqui…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDegree of Cure in Thermosetting ResinsEugene BarrCite this: Ind. Eng. Chem. 1956, 48, 1, 72–74Publication Date (Print):January 1, 1956Publication History Published online1 May 2002Published inissue 1 January 1956https://pubs.acs.org/doi/10.1021/ie50553a024https://doi.org/10.…
J. O. Warwicker, Trans. Faraday Soc., 1956, 52, 554 DOI: 10.1039/TF9565200554
Apart from two or three experiments at the beginning of the century, methods of polishing metallic surfaces by a process of anodic dissolution—electro-polishing or electrolytic polishing—have been known only for the last 25 years. Recently it has been discovered that electric current is not always indispensable, and a…
The effects of various gaseo us atmospheres on the thermal decompositi on of p oly tetrafiu oroet hy lene have been investigated in t he ran ge 450 0 to 500 0 C. Bot h cata ly sis a nd inhibit ion wer e obser ved . The inhibitor y su bstan ces, chlorine, hydrogen, carbon tetrachloride, and t oluen e, all produ ced m a…